Johnson underwent season-ending surgery on his right knee after getting hurt in the training camp's second practice. Last year, Johnson, a slot receiver, had leg injuries which restricted him to 45 catches for 497 yards and three touchdowns.

Lissemore continued to have problems with his shoulders in training camp. Lissemore, who played in 11 games for the Chargers last season, was headed for a backup role with the offseason signing of Brandon Mebane.

"This is a tough one," Chargers coach Mike McCoy said of Monday's roster moves. "We are talking about two guys that they know what it means to be a pro."